I'm 5'8" 205lbs don't know bf%, first cycle was Aratest 400mg. a wk for 10wks and Deca 400mg. a wk for 10 wks, did not care for the Aratest!!! This would be second cycle, gained 15 lbs off first, thanks.
When you use a larger dose of a certain compound for the first couple weeks so it has a faster effect in the body. Andy13 wrote a very good article on it a couple days ago, search for it as it is well worth the read